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From Mridul Muralidharan <mri...@gmail.com>
Subject Re: Spark config option 'expression language' feedback request
Date Fri, 13 Mar 2015 15:20:33 GMT
I am curious how you are going to support these over mesos and yarn.
Any configure change like this should be applicable to all of them, not
just local and standalone modes.

Regards
Mridul

On Friday, March 13, 2015, Dale Richardson <dale__r@hotmail.com> wrote:

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> PR#4937 ( https://github.com/apache/spark/pull/4937) is a feature to
> allow for Spark configuration options (whether on command line, environment
> variable or a configuration file) to be specified via a simple expression
> language.
>
>
> Such a feature has the following end-user benefits:
> - Allows for the flexibility in specifying time intervals or byte
> quantities in appropriate and easy to follow units e.g. 1 week rather
> rather then 604800 seconds
>
> - Allows for the scaling of a configuration option in relation to a system
> attributes. e.g.
>
> SPARK_WORKER_CORES = numCores - 1
>
> SPARK_WORKER_MEMORY = physicalMemoryBytes - 1.5 GB
>
> - Gives the ability to scale multiple configuration options together eg:
>
> spark.driver.memory = 0.75 * physicalMemoryBytes
>
> spark.driver.maxResultSize = spark.driver.memory * 0.8
>
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> The following functions are currently supported by this PR:
> NumCores:             Number of cores assigned to the JVM (usually ==
> Physical machine cores)
> PhysicalMemoryBytes:  Memory size of hosting machine
>
> JVMTotalMemoryBytes:  Current bytes of memory allocated to the JVM
>
> JVMMaxMemoryBytes:    Maximum number of bytes of memory available to the
> JVM
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> JVMFreeMemoryBytes:   maxMemoryBytes - totalMemoryBytes
>
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> I was wondering if anybody on the mailing list has any further ideas on
> other functions that could be useful to have when specifying spark
> configuration options?
> Regards,Dale.
>

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